/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:11:39,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:11:39,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:11:39,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:11:39,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:11:39,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:11:39,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:11:39,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:11:39,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:11:39,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:11:39,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:11:39,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:11:39,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:11:39,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:11:39,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:11:39,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:11:39,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:11:39,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:11:39,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:11:39,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:11:39,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:11:39,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:11:39,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:11:39,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:11:39,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:11:39,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:11:39,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:11:39,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:11:39,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:11:39,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:11:39,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:11:39,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:11:39,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:11:39,410 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:11:39,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:11:39,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:11:39,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:11:39,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:11:39,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:11:39,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:11:39,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:11:39,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:11:39,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:11:39,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:11:39,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:11:39,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:11:39,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:11:39,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:11:39,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:11:39,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:11:39,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:11:39,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:11:39,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:11:39,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:11:39,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:11:39,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:11:39,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:11:39,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:11:39,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:11:39,860 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:11:39,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:11:39,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9c5c111/aeb9f872b8394623b7724e4d2f5361bf/FLAGf5929931e [2020-12-22 08:11:40,836 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:11:40,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:11:40,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9c5c111/aeb9f872b8394623b7724e4d2f5361bf/FLAGf5929931e [2020-12-22 08:11:40,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9c5c111/aeb9f872b8394623b7724e4d2f5361bf [2020-12-22 08:11:40,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:11:40,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:11:40,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:11:40,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:11:40,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:11:40,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:11:40" (1/1) ... [2020-12-22 08:11:40,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f010ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:40, skipping insertion in model container [2020-12-22 08:11:40,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:11:40" (1/1) ... [2020-12-22 08:11:40,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:11:41,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:11:41,815 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30089,30102] [2020-12-22 08:11:41,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33478,33491] [2020-12-22 08:11:42,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:11:42,241 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:11:42,492 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30089,30102] [2020-12-22 08:11:42,543 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33478,33491] [2020-12-22 08:11:42,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:11:42,752 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:11:42,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42 WrapperNode [2020-12-22 08:11:42,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:11:42,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:11:42,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:11:42,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:11:42,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:11:42,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:11:42,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:11:42,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:11:42,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:42,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:43,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:43,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... [2020-12-22 08:11:43,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:11:43,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:11:43,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:11:43,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:11:43,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:11:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:11:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:11:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:11:43,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:11:46,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:11:46,439 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:11:46,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:11:46 BoogieIcfgContainer [2020-12-22 08:11:46,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:11:46,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:11:46,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:11:46,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:11:46,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:11:40" (1/3) ... [2020-12-22 08:11:46,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a7e22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:11:46, skipping insertion in model container [2020-12-22 08:11:46,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:11:42" (2/3) ... [2020-12-22 08:11:46,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a7e22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:11:46, skipping insertion in model container [2020-12-22 08:11:46,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:11:46" (3/3) ... [2020-12-22 08:11:46,452 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:11:46,458 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:11:46,464 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:11:46,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:11:46,518 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:11:46,518 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:11:46,518 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:11:46,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:11:46,518 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:11:46,519 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:11:46,519 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:11:46,519 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:11:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states. [2020-12-22 08:11:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:11:46,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:46,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:46,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 456360996, now seen corresponding path program 1 times [2020-12-22 08:11:46,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:46,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378374767] [2020-12-22 08:11:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:47,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378374767] [2020-12-22 08:11:47,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:47,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:11:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066852298] [2020-12-22 08:11:47,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:11:47,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:11:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:11:47,281 INFO L87 Difference]: Start difference. First operand 1121 states. Second operand 4 states. [2020-12-22 08:11:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:47,562 INFO L93 Difference]: Finished difference Result 2057 states and 3534 transitions. [2020-12-22 08:11:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:11:47,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 08:11:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:47,594 INFO L225 Difference]: With dead ends: 2057 [2020-12-22 08:11:47,595 INFO L226 Difference]: Without dead ends: 1118 [2020-12-22 08:11:47,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:11:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2020-12-22 08:11:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2020-12-22 08:11:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2020-12-22 08:11:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1889 transitions. [2020-12-22 08:11:47,738 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1889 transitions. Word has length 150 [2020-12-22 08:11:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:47,739 INFO L481 AbstractCegarLoop]: Abstraction has 1118 states and 1889 transitions. [2020-12-22 08:11:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:11:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1889 transitions. [2020-12-22 08:11:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-22 08:11:47,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:47,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:47,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:11:47,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1166050469, now seen corresponding path program 1 times [2020-12-22 08:11:47,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:47,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446388131] [2020-12-22 08:11:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446388131] [2020-12-22 08:11:48,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:48,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64702051] [2020-12-22 08:11:48,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:48,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:48,073 INFO L87 Difference]: Start difference. First operand 1118 states and 1889 transitions. Second operand 3 states. [2020-12-22 08:11:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:48,455 INFO L93 Difference]: Finished difference Result 2859 states and 4838 transitions. [2020-12-22 08:11:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:48,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2020-12-22 08:11:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:48,467 INFO L225 Difference]: With dead ends: 2859 [2020-12-22 08:11:48,468 INFO L226 Difference]: Without dead ends: 1949 [2020-12-22 08:11:48,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2020-12-22 08:11:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1939. [2020-12-22 08:11:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1939 states. [2020-12-22 08:11:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3239 transitions. [2020-12-22 08:11:48,560 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3239 transitions. Word has length 191 [2020-12-22 08:11:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:48,561 INFO L481 AbstractCegarLoop]: Abstraction has 1939 states and 3239 transitions. [2020-12-22 08:11:48,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3239 transitions. [2020-12-22 08:11:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 08:11:48,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:48,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:48,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:11:48,568 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 955874818, now seen corresponding path program 1 times [2020-12-22 08:11:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:48,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534979350] [2020-12-22 08:11:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534979350] [2020-12-22 08:11:48,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:48,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:48,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201925288] [2020-12-22 08:11:48,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:48,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:48,729 INFO L87 Difference]: Start difference. First operand 1939 states and 3239 transitions. Second operand 3 states. [2020-12-22 08:11:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:48,951 INFO L93 Difference]: Finished difference Result 3238 states and 5452 transitions. [2020-12-22 08:11:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:48,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-22 08:11:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:48,967 INFO L225 Difference]: With dead ends: 3238 [2020-12-22 08:11:48,968 INFO L226 Difference]: Without dead ends: 2328 [2020-12-22 08:11:48,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2020-12-22 08:11:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2324. [2020-12-22 08:11:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2020-12-22 08:11:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3895 transitions. [2020-12-22 08:11:49,086 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3895 transitions. Word has length 196 [2020-12-22 08:11:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 2324 states and 3895 transitions. [2020-12-22 08:11:49,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3895 transitions. [2020-12-22 08:11:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-12-22 08:11:49,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:49,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:49,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:11:49,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 339194995, now seen corresponding path program 1 times [2020-12-22 08:11:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:49,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795287459] [2020-12-22 08:11:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:49,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795287459] [2020-12-22 08:11:49,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:49,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934785196] [2020-12-22 08:11:49,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:49,301 INFO L87 Difference]: Start difference. First operand 2324 states and 3895 transitions. Second operand 3 states. [2020-12-22 08:11:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:49,862 INFO L93 Difference]: Finished difference Result 6356 states and 10643 transitions. [2020-12-22 08:11:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:49,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2020-12-22 08:11:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:49,898 INFO L225 Difference]: With dead ends: 6356 [2020-12-22 08:11:49,899 INFO L226 Difference]: Without dead ends: 4258 [2020-12-22 08:11:49,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2020-12-22 08:11:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4237. [2020-12-22 08:11:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4237 states. [2020-12-22 08:11:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 7060 transitions. [2020-12-22 08:11:50,184 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 7060 transitions. Word has length 199 [2020-12-22 08:11:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:50,186 INFO L481 AbstractCegarLoop]: Abstraction has 4237 states and 7060 transitions. [2020-12-22 08:11:50,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 7060 transitions. [2020-12-22 08:11:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 08:11:50,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:50,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:50,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:11:50,198 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 62690234, now seen corresponding path program 1 times [2020-12-22 08:11:50,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:50,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862822744] [2020-12-22 08:11:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:50,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862822744] [2020-12-22 08:11:50,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:50,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574012418] [2020-12-22 08:11:50,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:50,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:50,415 INFO L87 Difference]: Start difference. First operand 4237 states and 7060 transitions. Second operand 3 states. [2020-12-22 08:11:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:50,775 INFO L93 Difference]: Finished difference Result 7494 states and 12548 transitions. [2020-12-22 08:11:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:50,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 08:11:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:50,807 INFO L225 Difference]: With dead ends: 7494 [2020-12-22 08:11:50,808 INFO L226 Difference]: Without dead ends: 5396 [2020-12-22 08:11:50,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2020-12-22 08:11:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 5392. [2020-12-22 08:11:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5392 states. [2020-12-22 08:11:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 9002 transitions. [2020-12-22 08:11:51,112 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 9002 transitions. Word has length 204 [2020-12-22 08:11:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:51,112 INFO L481 AbstractCegarLoop]: Abstraction has 5392 states and 9002 transitions. [2020-12-22 08:11:51,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 9002 transitions. [2020-12-22 08:11:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-12-22 08:11:51,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:51,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:51,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:11:51,129 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1975423087, now seen corresponding path program 1 times [2020-12-22 08:11:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:51,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155586638] [2020-12-22 08:11:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:51,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155586638] [2020-12-22 08:11:51,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:51,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:51,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086222887] [2020-12-22 08:11:51,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:51,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:51,345 INFO L87 Difference]: Start difference. First operand 5392 states and 9002 transitions. Second operand 3 states. [2020-12-22 08:11:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:52,046 INFO L93 Difference]: Finished difference Result 15236 states and 25366 transitions. [2020-12-22 08:11:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:52,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-12-22 08:11:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:52,122 INFO L225 Difference]: With dead ends: 15236 [2020-12-22 08:11:52,122 INFO L226 Difference]: Without dead ends: 10088 [2020-12-22 08:11:52,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2020-12-22 08:11:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 10035. [2020-12-22 08:11:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10035 states. [2020-12-22 08:11:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 16607 transitions. [2020-12-22 08:11:52,814 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 16607 transitions. Word has length 207 [2020-12-22 08:11:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:52,815 INFO L481 AbstractCegarLoop]: Abstraction has 10035 states and 16607 transitions. [2020-12-22 08:11:52,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 16607 transitions. [2020-12-22 08:11:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 08:11:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:52,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:52,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:11:52,844 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1745832106, now seen corresponding path program 1 times [2020-12-22 08:11:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:52,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111976360] [2020-12-22 08:11:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:53,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111976360] [2020-12-22 08:11:53,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:53,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592605869] [2020-12-22 08:11:53,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:53,031 INFO L87 Difference]: Start difference. First operand 10035 states and 16607 transitions. Second operand 3 states. [2020-12-22 08:11:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:53,723 INFO L93 Difference]: Finished difference Result 18168 states and 30221 transitions. [2020-12-22 08:11:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:53,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 08:11:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:53,757 INFO L225 Difference]: With dead ends: 18168 [2020-12-22 08:11:53,757 INFO L226 Difference]: Without dead ends: 13020 [2020-12-22 08:11:53,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2020-12-22 08:11:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 13016. [2020-12-22 08:11:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13016 states. [2020-12-22 08:11:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 21565 transitions. [2020-12-22 08:11:54,457 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 21565 transitions. Word has length 212 [2020-12-22 08:11:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:54,457 INFO L481 AbstractCegarLoop]: Abstraction has 13016 states and 21565 transitions. [2020-12-22 08:11:54,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 21565 transitions. [2020-12-22 08:11:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 08:11:54,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:54,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:54,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:11:54,481 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:54,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1067466193, now seen corresponding path program 1 times [2020-12-22 08:11:54,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:54,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769088499] [2020-12-22 08:11:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769088499] [2020-12-22 08:11:54,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:54,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147413956] [2020-12-22 08:11:54,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:54,648 INFO L87 Difference]: Start difference. First operand 13016 states and 21565 transitions. Second operand 3 states. [2020-12-22 08:11:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:55,802 INFO L93 Difference]: Finished difference Result 37226 states and 61403 transitions. [2020-12-22 08:11:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:55,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 08:11:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:55,865 INFO L225 Difference]: With dead ends: 37226 [2020-12-22 08:11:55,865 INFO L226 Difference]: Without dead ends: 24472 [2020-12-22 08:11:55,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24472 states. [2020-12-22 08:11:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24472 to 24325. [2020-12-22 08:11:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24325 states. [2020-12-22 08:11:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24325 states to 24325 states and 39826 transitions. [2020-12-22 08:11:57,270 INFO L78 Accepts]: Start accepts. Automaton has 24325 states and 39826 transitions. Word has length 215 [2020-12-22 08:11:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:57,270 INFO L481 AbstractCegarLoop]: Abstraction has 24325 states and 39826 transitions. [2020-12-22 08:11:57,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24325 states and 39826 transitions. [2020-12-22 08:11:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 08:11:57,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:57,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:57,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:11:57,311 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -518054986, now seen corresponding path program 1 times [2020-12-22 08:11:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:57,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257736026] [2020-12-22 08:11:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:57,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257736026] [2020-12-22 08:11:57,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:57,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:11:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7508233] [2020-12-22 08:11:57,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:11:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:11:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:57,463 INFO L87 Difference]: Start difference. First operand 24325 states and 39826 transitions. Second operand 3 states. [2020-12-22 08:11:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:58,649 INFO L93 Difference]: Finished difference Result 44146 states and 72658 transitions. [2020-12-22 08:11:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:11:58,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 08:11:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:58,728 INFO L225 Difference]: With dead ends: 44146 [2020-12-22 08:11:58,729 INFO L226 Difference]: Without dead ends: 31392 [2020-12-22 08:11:58,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:11:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31392 states. [2020-12-22 08:12:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31392 to 31388. [2020-12-22 08:12:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31388 states. [2020-12-22 08:12:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31388 states to 31388 states and 51376 transitions. [2020-12-22 08:12:00,205 INFO L78 Accepts]: Start accepts. Automaton has 31388 states and 51376 transitions. Word has length 220 [2020-12-22 08:12:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 31388 states and 51376 transitions. [2020-12-22 08:12:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 31388 states and 51376 transitions. [2020-12-22 08:12:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 08:12:00,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:00,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:00,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:12:00,253 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 855859059, now seen corresponding path program 1 times [2020-12-22 08:12:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:00,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702884213] [2020-12-22 08:12:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:00,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702884213] [2020-12-22 08:12:00,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:00,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:12:00,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564342673] [2020-12-22 08:12:00,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:12:00,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:12:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:00,728 INFO L87 Difference]: Start difference. First operand 31388 states and 51376 transitions. Second operand 6 states. [2020-12-22 08:12:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:06,700 INFO L93 Difference]: Finished difference Result 160651 states and 264588 transitions. [2020-12-22 08:12:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:12:06,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2020-12-22 08:12:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:07,385 INFO L225 Difference]: With dead ends: 160651 [2020-12-22 08:12:07,386 INFO L226 Difference]: Without dead ends: 129537 [2020-12-22 08:12:07,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:12:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129537 states. [2020-12-22 08:12:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129537 to 84924. [2020-12-22 08:12:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84924 states. [2020-12-22 08:12:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84924 states to 84924 states and 138910 transitions. [2020-12-22 08:12:12,920 INFO L78 Accepts]: Start accepts. Automaton has 84924 states and 138910 transitions. Word has length 223 [2020-12-22 08:12:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:12,920 INFO L481 AbstractCegarLoop]: Abstraction has 84924 states and 138910 transitions. [2020-12-22 08:12:12,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:12:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84924 states and 138910 transitions. [2020-12-22 08:12:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:12:13,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:13,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:13,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:12:13,018 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1539236947, now seen corresponding path program 1 times [2020-12-22 08:12:13,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:13,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167009223] [2020-12-22 08:12:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:13,367 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-12-22 08:12:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:13,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167009223] [2020-12-22 08:12:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228259624] [2020-12-22 08:12:13,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:13,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:13,467 INFO L87 Difference]: Start difference. First operand 84924 states and 138910 transitions. Second operand 4 states. [2020-12-22 08:12:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:19,486 INFO L93 Difference]: Finished difference Result 234072 states and 384732 transitions. [2020-12-22 08:12:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:19,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 08:12:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:19,767 INFO L225 Difference]: With dead ends: 234072 [2020-12-22 08:12:19,767 INFO L226 Difference]: Without dead ends: 149422 [2020-12-22 08:12:19,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:12:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149422 states. [2020-12-22 08:12:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149422 to 135914. [2020-12-22 08:12:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135914 states. [2020-12-22 08:12:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135914 states to 135914 states and 222448 transitions. [2020-12-22 08:12:26,756 INFO L78 Accepts]: Start accepts. Automaton has 135914 states and 222448 transitions. Word has length 225 [2020-12-22 08:12:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:26,756 INFO L481 AbstractCegarLoop]: Abstraction has 135914 states and 222448 transitions. [2020-12-22 08:12:26,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 135914 states and 222448 transitions. [2020-12-22 08:12:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:12:26,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:26,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:26,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:12:26,877 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:26,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2146001833, now seen corresponding path program 1 times [2020-12-22 08:12:26,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:26,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327727548] [2020-12-22 08:12:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327727548] [2020-12-22 08:12:27,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:27,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:27,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599353792] [2020-12-22 08:12:27,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:27,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:27,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:27,074 INFO L87 Difference]: Start difference. First operand 135914 states and 222448 transitions. Second operand 4 states. [2020-12-22 08:12:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:36,990 INFO L93 Difference]: Finished difference Result 373084 states and 611836 transitions. [2020-12-22 08:12:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:36,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-12-22 08:12:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:37,512 INFO L225 Difference]: With dead ends: 373084 [2020-12-22 08:12:37,512 INFO L226 Difference]: Without dead ends: 237444 [2020-12-22 08:12:37,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237444 states. [2020-12-22 08:12:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237444 to 210408. [2020-12-22 08:12:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210408 states. [2020-12-22 08:12:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210408 states to 210408 states and 343392 transitions. [2020-12-22 08:12:48,517 INFO L78 Accepts]: Start accepts. Automaton has 210408 states and 343392 transitions. Word has length 226 [2020-12-22 08:12:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:48,518 INFO L481 AbstractCegarLoop]: Abstraction has 210408 states and 343392 transitions. [2020-12-22 08:12:48,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 210408 states and 343392 transitions. [2020-12-22 08:12:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-22 08:12:48,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:48,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:48,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:12:48,716 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 989961350, now seen corresponding path program 1 times [2020-12-22 08:12:48,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:48,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146287488] [2020-12-22 08:12:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:48,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146287488] [2020-12-22 08:12:48,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:48,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:48,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512482616] [2020-12-22 08:12:48,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:48,844 INFO L87 Difference]: Start difference. First operand 210408 states and 343392 transitions. Second operand 4 states. [2020-12-22 08:13:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:08,450 INFO L93 Difference]: Finished difference Result 663299 states and 1084962 transitions. [2020-12-22 08:13:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:13:08,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2020-12-22 08:13:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:09,365 INFO L225 Difference]: With dead ends: 663299 [2020-12-22 08:13:09,365 INFO L226 Difference]: Without dead ends: 453165 [2020-12-22 08:13:09,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:13:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453165 states. [2020-12-22 08:13:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453165 to 332210. [2020-12-22 08:13:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332210 states. [2020-12-22 08:13:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332210 states to 332210 states and 540404 transitions. [2020-12-22 08:13:28,941 INFO L78 Accepts]: Start accepts. Automaton has 332210 states and 540404 transitions. Word has length 227 [2020-12-22 08:13:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:28,941 INFO L481 AbstractCegarLoop]: Abstraction has 332210 states and 540404 transitions. [2020-12-22 08:13:28,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:13:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 332210 states and 540404 transitions. [2020-12-22 08:13:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 08:13:29,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:29,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:13:29,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:13:29,203 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -108589616, now seen corresponding path program 1 times [2020-12-22 08:13:29,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:29,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760354531] [2020-12-22 08:13:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:29,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760354531] [2020-12-22 08:13:29,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:29,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:13:29,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084899249] [2020-12-22 08:13:29,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:13:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:13:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:13:29,873 INFO L87 Difference]: Start difference. First operand 332210 states and 540404 transitions. Second operand 4 states. [2020-12-22 08:14:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:03,483 INFO L93 Difference]: Finished difference Result 1016558 states and 1656674 transitions. [2020-12-22 08:14:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:14:03,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2020-12-22 08:14:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:05,070 INFO L225 Difference]: With dead ends: 1016558 [2020-12-22 08:14:05,070 INFO L226 Difference]: Without dead ends: 684622 [2020-12-22 08:14:05,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:14:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684622 states. [2020-12-22 08:14:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684622 to 508076. [2020-12-22 08:14:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508076 states. [2020-12-22 08:14:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508076 states to 508076 states and 823567 transitions. [2020-12-22 08:14:36,916 INFO L78 Accepts]: Start accepts. Automaton has 508076 states and 823567 transitions. Word has length 228 [2020-12-22 08:14:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:36,917 INFO L481 AbstractCegarLoop]: Abstraction has 508076 states and 823567 transitions. [2020-12-22 08:14:36,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:14:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 508076 states and 823567 transitions. [2020-12-22 08:14:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-22 08:14:37,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:37,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:14:37,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:14:37,366 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash -192327276, now seen corresponding path program 1 times [2020-12-22 08:14:37,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:37,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543218821] [2020-12-22 08:14:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:14:38,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543218821] [2020-12-22 08:14:38,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:38,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:14:38,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838464183] [2020-12-22 08:14:38,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:14:38,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:38,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:14:38,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:14:38,061 INFO L87 Difference]: Start difference. First operand 508076 states and 823567 transitions. Second operand 6 states.